Dr. Kevorkian has helped more than a dozen terminally-ill people kill themselves. As a result, physician-assisted suicide has once again become a red-hot debate, with the inventor of the ''suicide machine'' at the center. Now the famed doctor talks about why he continues his struggle.

Dr. Kevorkian has helped more than a dozen terminally-ill people kill themselves. As a result, physician-assisted suicide has once again become a red-hot debate, with the inventor of the ''suicide machine'' at the center. Now the famed doctor talks about why he continues his struggle.